The TopGas Max is exceptionally efficient, with seasonal efficiencies up to 98.2% at full load, and 108.2% at part load, this boiler squeezes the most out of every kilowatt of gas. That translates directly into: 

• Lower fuel bills 
• Reduced emissions 
• Faster payback on investment 

Thanks to its modulating premix burner, the TopGas Max adjusts its output between 20% and 100% in real time, always matching the building’s actual heat demand. No waste, no overspending, just smart, efficient heating. 
 

Unlike many high-performance systems, the TopGas Max is designed with affordability in mind. As Hoval’s most cost-effective gas condensing boiler, it delivers an excellent combination: advanced technology and long-term reliability at a modest price point. 

This makes it a great solution for: 

• Projects with tight budgets 
• Refurbishments where cost-effectiveness is key 
• Multi-residential and commercial buildings that need robust heating without over specifying 

And when scalability is needed, multiple units can be combined in a cascade setup to deliver outputs up to 500 kW, still without the high price tag of many floor-standing systems. 
 

The TopGas Max is ready for tomorrow’s energy mix: 

• Natural gas 
• Propane 
• 100% biomethane 
• Up to 20% hydrogen blend 

That means your investment stays viable, even as energy policies and supply sources evolve, giving you cost stability and compliance without equipment replacement. 

Whether you’re working on a new apartment block, commercial property or a refurbishment project, the TopGas Max offers: 

• High output without high capital cost 
• Exceptional efficiency with low running costs 
• Flexibility in design, fuel and control 
• Smart scalability up to 500kW 
• Hoval support from planning to operation 
   

With the TopGas Max, high performance heating no longer comes with a premium price tag. It’s a smart, future-ready solution that proves energy efficiency doesn’t have to mean financial compromise.  

High efficiency, low cost, no compromise.